The dielectric, lightweight polycarbonate frame features a single, flexible lens that blocks 99.9% of ultraviolet rays and provides an excellent orbital seal. A unique and extremely flexible temple design is the distinguishing feature of these safety glasses. This flexibility allows the IA1 series to fit a variety of face sizes. Additional features include non-slip wrap-around TPR temple sleeves for comfort and grip plus an adjustable soft TPR nose pad. This series has Duramass® scratch resistant coated lens on all options. Select options are available with an anti-fog lens coating. Choose the best safety glasses, choose MCR Safety!